Effect of Nanosheet Size on Activity and Durability of RuO2 Nanosheet Pt/C Catalyst

Composite catalyst (RuO 2 ns-Pt/C) composed of commercial carbon supported Pt (Pt/C) and various size RuO 2 nanosheets (RuO 2 ns) were synthesized.The improvement in ORR activity and durability of the different catalysts has been evaluated and is discussed as a function of the size of RuO 2 ns. The RuO 2 ns size was found to greatly influence the catalytic properties with smaller RuO2ns giving better performance than larger ones. Composite catalyst with small sized RuO 2 ns exhibit initial activity 2 times higher than Pt/C catalyst and improved activity retention rate.